U.S. Department of Energy - Energy Efficiency and Renewable Energy
Building Technologies Office – Energy Open House
Attic Energy Facts
Attic Stairs: One of the largest air leaks into the attic occurs through the pull-down stairs or hatch entry into the attic. Fortunately, this is an easy fix.
Bathroon Fan Vent: To avoid potentially serious problems with mold, bathroom fans must vent to the outdoors.
- Proper ventilation can lower the attic temperature by as much as 50°F, which significantly reduces the home's cooling demands.
- Ridge and soffit vents help keep the attic space well-ventilated, preventing a build-up of moisture and reducing heat in summer. These vents can prolong the life of the roof.
- Air sealing is one of the most significant energy efficiency improvements you can make to your home. Attic floor penetrations should always be sealed to keep dust and mold out, and to keep energy bills down.
- Unsealed and uninsulated recessed can lights are a common source of energy loss.
- Recessed can lights and other components that can produce heat, such as electrical boxes, are a potential safety hazard. They should be kept at least three inches away from insulation using a barrier such as wire mesh.
Attic Insulation: Many older homes have inadequate or failed insulation. Homeowners can reduce heating and cooling needs by up to 10% by investing in proper insulation and sealing air leaks.